“There have been only two trials worldwide of people with type 2 diabetes on what looks to be a paleo diet,” said Associate Professor Andrikopoulos, a researcher at the University of Melbourne Department of Medicine, based at the Austin Hospital.

“Both studies had fewer than 20 participants, one had no control diet, and at 12 weeks or less, neither study lasted long enough for us to draw solid conclusions about the impact on weight or glycemic control.”

Associate Professor Andrikopoulos, who is also President of the Australian Diabetes Society, recommended people with type 2 diabetes seek advice from their GPs, registered dietitians and diabetes organisations.

“Most paleo diets insist on avoiding refined sugar and processed food, which is consistent with dietary guidelines worldwide,” he said.

“But when you start cutting out whole grains and dairy, which are absent from many forms of the paleo diet, you may forgo important sources of fibre and calcium.

“And high-­fat, zero-­carb diets promoted by some celebrities make this worse, as they can lead to rapid weight gain, as well as increase your risk of heart disease.”

“While it’s tempting to emulate celebrities who look great and can spend a lot of time at the gym, if you’re already overweight or you live a sedentary life, it may be quite risky to adopt a high-­fat diet… and if you have diabetes, it’s downright dangerous.

“The internet is full of testimonials from people saying a particular diet worked for them because they cut calories and lost weight, but people with diabetes in particular need to approach those claims with caution and seek advice from their health care professional.”